cl-torrents, app and (extensive) tutorial: web scraping and building executables

Lately we exercised our Lisp skills by writing
cl-torrents, an app that
searches for torrents on several sources (the Pirate Bay through
piratebay.to, Kickass torrents and torrent.cd), and we wrote an
extensive tutorial
in the making (that was actually our primary goal). It comes as a
library to use from the REPL and as a self-contained executable
(download and run, nothing more to install). You’ll find the following
topics in the tutorial: